Mahabharata 8.24.5
तप उग्रं समास्थाय नियमे परमे स्थिताःतपसा कर्शयामासुर्देहान्स्वाञ्शत्रुतापन
tapa ugraṃ samāsthāya niyame parame sthitāḥtapasā karśayāmāsurdehānsvāñśatrutāpana
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book